Chemistry Gases MDCAT 2015
PMDC Verified Question 61 of 65
Which graph represents Boyle's law?
A
Graph of Volume vs Pressure showing an increasing curve
B
Graph of Volume vs Pressure showing a horizontal line
C
Graph of Volume vs 1/Pressure showing a straight line passing through the origin
D
Graph of Volume vs Pressure showing a decreasing straight line
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Graph of Volume vs 1/Pressure showing a straight line passing through the origin
Concept:

Boyle's Law states that at constant temperature, the volume of a fixed mass of an ideal gas is inversely proportional to its pressure: \( V \propto \frac{1}{P} \).

Solution:

  • Because \( V = k \times \frac{1}{P} \), this relationship mimics the linear equation \( y = mx + c \), where \( y = V \), \( x = \frac{1}{P} \), and the intercept \( c = 0 \).


  • Therefore, plotting Volume (V) on the y-axis against the inverse of Pressure (1/P) on the x-axis yields a straight line passing through the origin.


Why other options are incorrect:

  • Options A, B, & D: A plot of V vs P must be a hyperbola (a decreasing curve), not an increasing curve, horizontal line, or a straight decreasing line.

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

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